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Possible Duplicate:
Can I skip over releases?

I'm at a 11.04 and want to get to 12.10. update-manager only offers me 11.10. Do I have to do 3 separate upgrades to get to 12.10?

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It's not recommended to do that as Upgrading twice or thrice can cause problems. Programs become outdated and/or are incompatible with the new version so they either crash constantly or screw other things up and cause them to crash constantly. I recommend doing a clean install, but if you have the HardDisk space you can make a separate partition for 12.10. This way you can boot to either versions and slowly migrate yourself to the new version until you're ready to switch completely. This is what I did when I switched from 11.04 to 12.04. – japzone Dec 3 '12 at 4:34

marked as duplicate by Web-E, Sergey, Rinzwind, fossfreedom♦ Dec 3 '12 at 9:37

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It seems that it's possible, but warned against. For example, the user in my first link began to have issues.

From the Ubuntu Wiki:

To avoid damaging your running system, upgrading should only be done from one release to the next release (e.g. Ubuntu 9.04 to Ubuntu 9.10) or from one LTS release to the next (e.g. Ubuntu 6.06 LTS to Ubuntu 8.04 LTS). If you wish to 'skip' a version, you can backup your data and do a fresh installation, or progressively upgrade to each successive version. For example, to upgrade from Ubuntu 8.10 to Ubuntu 9.10, first upgrade to 9.04, then upgrade 9.04 to 9.10.

However, it does seem that LiveUSBs can upgrade multiple versions?

Discussed in: upgrade from 10.10 to 11.10

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